JPS613031A - Method for measuring flowability of highly viscous substance - Google Patents

Abstract

PURPOSE:To perform the evaluation of flowability with good accuracy, by rotating a rotor, which is constituted by forming projections to the outer peripheral surface of a columnar main body, in a highly viscous substance being a measuring object. CONSTITUTION:A measuring specimen 3 is received in a container 7 and a rotor main body 5 is rotated in the measuring specimen 3 to measure the torque of the rotor shaft 4. The rotor main body 1 has projections provided to the outer peripheral surface thereof and, when the rotor main body 5 is rotated in the measuring specimen 3, the specimen 3 flows and the flowing resistance, that is, the viscosity of the specimen at this time is taken out as the torque of the shaft 4 and detected as the current value corresponding to the torque.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for measuring the fluidity of a highly viscous fluid such as a ceramic resin kneaded material.

BACKGROUND ART Generally, in order to measure the viscosity of a fluid having a certain viscosity, it is convenient to use a rotational viscometer as shown in FIG. 6, and it has been widely used in the past.

In the rotational viscometer shown in the figure, a cylindrical blade 2 attached to a shaft 1 is rotated within a measurement sample 3, and in the process, the viscosity of the measurement sample 3 is measured by 1 to 1 lux applied to the shaft 1. Ru.

However, when attempting to measure the viscosity of a highly viscous substance of 103 POISE or higher or a highly viscous kneaded material (abbreviated as "high viscosity material" under JS) using the conventional rotational viscometer described above, the The blade 2 becomes idle in the viscous material. Therefore, conventional rotational viscometers cannot measure the viscosity of highly viscous substances. Conventionally, when measuring the viscosity of a highly viscous material, it is common practice to measure the weight of the object that flows out within a certain period of time when a certain load is applied to the object. Ta. However, such conventional methods have the problem of poor measurement accuracy.For example, in the process of manufacturing ceramic products by injection molding, ceramics (SiC, Si3N4, etc.)
There has been a problem in that it is inconvenient to evaluate the viscosity of a kneaded product of and resin (APP, EVA1 paraffin, etc.) in advance.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object of the present invention to provide a method for measuring the fluidity of a highly viscous material, which can easily and accurately measure the fluidity of a highly viscous material. The purpose is to

The structure of the invention, that is, the method for measuring the fluidity of a highly viscous material according to the present invention is to rotate a rotating body having a cylindrical main body with a protrusion formed on the outer circumferential surface within a highly viscous material to be measured, and to measure the fluidity of the material. The present invention is characterized in that the rotational torque of the rotating body is detected, and the fluidity of the high-viscosity material is evaluated based on the torque value.

Example Next, this invention will be explained in more detail.

FIG. 1 and FIG. 2 show an example of a rotating body for carrying out the present invention. A rotating body 5 is attached to a shaft 4 connected to a drive source (not shown), and blade-like protrusions 6 protrude in three directions and are attached in two rows to the side surface of the rotating body 5. ing.

FIGS. 3 and 4 show an example of implementing the present invention using the rotating body shown in FIGS. 1 and 2. FIG.

In FIG. 3, a measurement sample is placed in a container 7, and the rotating body shown in FIGS. 1 and 2 is rotated in the measurement sample, and the axis
This is an example of measuring the torque of Further, FIG. 5 shows an example in which the rotating body shown in FIGS. 2 and 3 is applied to a laboratory blast mill having a well-known mechanism.

As shown in FIG. 4 and FIG. C is taken out as torque, and C is detected as a current value corresponding to C torque by a well-known mechanism.

FIG. 6 shows the relationship between the measured torque value and the viscosity of the measured sample when the present invention is implemented. Curve A in the figure
shows a case in which the present invention is implemented, and song IIS shows a case in which a conventional rotational viscometer is used.

As shown in the figure, in the conventional method, the torque value remains constant even if the viscosity of 8ItFl changes, but when this invention is implemented, the change in torque value almost corresponds to the change in viscosity of the sample, and the ra It can be seen that the viscosity of highly viscous materials can be measured well.

In addition, in the rotating body shown in FIGS. 2 and 3 above,
The shape of the protrusion 6 attached to the rotating body 5 can be variously prepared, and the shape and size may be such that the flow resistance of the sample can be detected.

When measuring the viscosity of a mixed material such as ceramic and resin, if the mixing progresses significantly due to the rotation of the rotating body during the measurement, the viscosity of the mixed material will change from the viscosity at the start of the measurement. As a result, it is expected that accurate viscosity measurement will be difficult, so the protrusion of the rotating body should have a shape and size that imparts flow to the kneaded material to be measured but prevents kneading from proceeding as much as possible. It is desirable to select

Effects of the Invention As described above, according to the present invention, a rotating body having a protrusion formed on the outer peripheral surface of a cylindrical body is rotated in a high viscosity material to be measured, and the rotational torque of the rotating body is detected. By evaluating the fluidity of a highly viscous material, it is possible to easily and accurately evaluate the fluidity of a highly viscous material.

In particular, in the process of manufacturing ceramic products by injection molding, it is possible to quickly and accurately evaluate the fluidity of a mixture of ceramic and resin in advance, contributing to improvements in the productivity and quality of ceramic products. I can do it.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a rotating body used for carrying out the present invention, Fig. 2 is a view from the direction of Fig. , FIG. 4 is a schematic diagram showing four other groups implementing the method of the present invention, and FIG. 5 is a diagram showing the relationship between the torque value and fluidity measured by implementing the method of the present invention. FIG. 6 is a schematic diagram showing a conventional rotational viscosity rg 31. 3...Measurement sample, 4...Axis, 5...Rotating body body, 6...Protrusion. Applicant Toyota Motor Corporation Agent Patent Attorney e[11tf'C Kuni J or 18) Figure 1 Figure 3 Figure 5 Figure 2 Figure 4 Figure 6

Claims (1)

[Claims] A rotating body having a cylindrical body with protrusions formed on the outer peripheral surface is rotated within the high viscosity material to be measured, the rotational torque of the rotating body is detected, and the torque value is used to detect the high viscosity material. A method for measuring the fluidity of a highly viscous material, the method comprising evaluating the fluidity of a highly viscous material.